daq

The Data AcQuisition software (HR DAQ) is used to collect and analyse data from a variety of instruments used in physical models such as wave gauges, Acoustic Doppler Velocimeters (ADV) and pressure sensors.

Product features:

• Specifically designed for wave analysis
• Instrument calibration
• Data collection
• Spectral analysis
• Statistical and wave counting analysis
• Reflection analysis

This comprehensive Windows based data acquisition and analysis program, suitable for 64 analogue input channels, is project based and is split into three sections.

Calibration and scaling of inputs

The calibration section allows the modeller to calibrate any instruments installed in physical models that require regular in-situ calibration, such as resistance type wave probes. It also allows the modeller to enter factory calibrations for other sensors such as pressure sensors.

This section creates calibration files for use with the acquisition and analysis sections. It provides a comprehensive set of facilities for setting up the calibration files that are used to convert the analogue voltage signals in the model, to data at full scale, assuming Froude or Reynolds scaling.

Data acquisition

HR DAQ is set to collect raw data for a specified period of time at a specified frequency.

Data analysis

After the data has been collected, HR DAQ can be used to perform a number of analysis routines. The principal analysis program includes two routines; one is a Fast Fourier Transform spectral analysis and the other a statistical one.

Specification

Calibration routine:

• Labelling of input channels
• Automatic calibration with Linear Least Squares fit shown for each channel
• Automatic setting of zero levels

Data collection:

• Sampling frequency 1-500Hz
• Monitoring of channels during data collection
• Trace of all channels displayed or turned off as necessary
• Elapsed time and time to completion
• Requires compatible Analogue to Digital (A/D) converter

Data analysis:

• Spectral analysis
• Energy density
• Hs m0, m2, m4, Tp

Statistical analysis:

H1/3, Tm, Standard deviation, Variance, Reflection analysis, Bulk reflection coefficient, Incident and reflected spectra

Hardware/software requirements:

• Desktop or laptop with Quad Core processor
• Software can be downloaded directly from our web-server
• Windows-based environment operating system
• One user licence activation code provided per computer